Is Face Planar Node
The Is Face Planar node outputs whether every triangle of a quads or N-gons is on the same plane as all of the others, in other words, if they have the same normal.
For example, a non-planar face can be created by moving a single vertex in a face but not the others. Triangles will always be planar.
The distance a point can be from the surface before the face is no longer considered planar.
Whether each mesh face is planar.
Combined with the Set Material(マテリアル設定)ノード, this node is used to visualize all non-planar faces in a mesh.